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Silver Bow Creek/Butte Area Superfund Site

Submissions from 2026 2026

Butte Priority Soils Operable Unit (BPSOU) 2025 Monthly Progress Report. Consent Decree for the Butte Priority Soils Operable Unit. Civil Action No. CV 89-039-BU-SEH, Atlantic Richfield Company

Final Repository Siting Study (RSS) Detailed Evaluation and Recommendations Report, Atlantic Richfield Company and Butte Silver Bow

2020 through 2024 Groundwater Compliance Evaluation Technical Memorandums Silver Bow Creek Butte Area NPL Site, Butte Priority Soils Operable Unit Consent Decree-Civil Action No. CV 89-039-BU-SHE, Josh Bryson

2020 through 2024 Groundwater Compliance Evaluation Technical Memorandums Silver Bow Creek Butte Area NPL Site, Butte Priority Soils Operable Unit Consent Decree-Civil Action No. CV 89-039-BU-SHE, Josh Bryson

2020 through 2024 Groundwater Compliance Evaluation Technical Memorandums Silver Bow Creek Butte Area NPL Site, Butte Priority Soils Operable Unit Consent Decree-Civil Action No. CV 89-039-BU-SHE, Josh Bryson

2020 through 2024 Groundwater Compliance Evaluation Technical Memorandums Silver Bow Creek Butte Area NPL Site, Butte Priority Soils Operable Unit Consent Decree-Civil Action No. CV 89-039-BU-SHE, Josh Bryson

2020 through 2024 Groundwater Compliance Evaluation Technical Memorandums Silver Bow Creek Butte Area NPL Site, Butte Priority Soils Operable Unit Consent Decree-Civil Action No. CV 89-039-BU-SHE, Josh Bryson

2020 through 2024 Surface Water Compliance Evaluation Technical Memorandums Silver Bow Creek Butte Area NPL Site, Butte Priority Soils Operable Unit Consent Decree-Civil Action No. CV 89-039-BU-SHE, Josh Bryson

2020 through 2024 Surface Water Compliance Evaluation Technical Memorandums Silver Bow Creek Butte Area NPL Site, Butte Priority Soils Operable Unit Consent Decree-Civil Action No. CV 89-039-BU-SHE, Josh Bryson

2020 through 2024 Surface Water Compliance Evaluation Technical Memorandums Silver Bow Creek Butte Area NPL Site, Butte Priority Soils Operable Unit Consent Decree-Civil Action No. CV 89-039-BU-SHE, Josh Bryson

2020 through 2024 Surface Water Compliance Evaluation Technical Memorandums Silver Bow Creek Butte Area NPL Site, Butte Priority Soils Operable Unit Consent Decree-Civil Action No. CV 89-039-BU-SHE, Josh Bryson

2020 through 2024 Surface Water Compliance Evaluation Technical Memorandums Silver Bow Creek Butte Area NPL Site, Butte Priority Soils Operable Unit Consent Decree-Civil Action No. CV 89-039-BU-SHE, Josh Bryson

Butte Priority Soils Operable Unit (BPSOU) 2026 Monthly Progress Report. Consent Decree for the Butte Priority Soils Operable Unit. Civil Action No. CV 89-039-BU-SEH, Josh Bryson

Butte Priority Soils Operable Unit (BPSOU) 2026 Monthly Progress Report. Consent Decree for the Butte Priority Soils Operable Unit. Civil Action No. CV 89-039-BU-SEH, Josh Bryson

Butte Priority Soils Operable Unit (BPSOU) 2026 Monthly Progress Report. Consent Decree for the Butte Priority Soils Operable Unit. Civil Action No. CV 89-039-BU-SEH, Josh Bryson

Butte Priority Soils Operable Unit Diggings East Final 100% Remedial Design Package Submittal, Josh Bryson

Butte Priority Soils Operable Unit Diggings East Final 100% Remedial Design Package Submittal, Josh Bryson

Butte Priority Soils Operable Unit Diggings East Final 95% Remedial Design Package Submittal, Josh Bryson

https://digitalcommons.mtech.edu/superfund_silverbowbutte/1787/, Josh Bryson

MONTHLY PROGRESS REPORT BUTTE PRIORITY SOILS OPERABLE UNIT CONSENT DECREE PARTIAL REMEDIAL DESIGN/REMEDIAL ACTION AND OPERATION AND MAINTENANCE, Josh Bryson

MONTHLY PROGRESS REPORT BUTTE PRIORITY SOILS OPERABLE UNIT CONSENT DECREE PARTIAL REMEDIAL DESIGN/REMEDIAL ACTION AND OPERATION AND MAINTENANCE, Josh Bryson

MONTHLY PROGRESS REPORT BUTTE PRIORITY SOILS OPERABLE UNIT CONSENT DECREE PARTIAL REMEDIAL DESIGN/REMEDIAL ACTION AND OPERATION AND MAINTENANCE January 2026, Josh Bryson

RE: 1st Quarter 2026 – Interim Site-Wide Surface Water Monitoring Data Report Silver Bow Creek Butte Area NPL Site, Butte Priority Soils Operable Unit Consent Decree-Civil Action No. CV 89-039-BU-SHE, Josh Bryson

RE: 2026 Spring Semi-Annual – Interim Site-Wide Groundwater Monitoring Data Report Silver Bow Creek Butte Area NPL Site, Butte Priority Soils Operable Unit Consent Decree-Civil Action No. CV 89-039-BU-SHE, Josh Bryson

RE: 2nd Quarter 2026 – Interim Site-Wide Surface Water Monitoring Data Report Silver Bow Creek Butte Area NPL Site, Butte Priority Soils Operable Unit Consent Decree-Civil Action No. CV 89-039-BU-SHE, Josh Bryson

RE: Request for Change to the Butte Priority Soils Operable Unit Clark Tailings Consolidated Waste Management Area Site Investigation Quality Assurance Project Plan Revision 0 (2026 Update), Josh Bryson

Response to Agency Comments Re: Comment Letter for the 2022 Butte Priority Soils Operable Unit (BPSOU) Groundwater Compliance Evaluation (dated March 10, 2025), Josh Bryson

Response to Agency Comments Re: Comment Letter for the 2023 Butte Priority Soils Operable Unit (BPSOU) Groundwater Compliance Evaluation (dated March 10, 2025) Received May 7, 2025, Josh Bryson

Response to Agency Comments Re: Comments on the Draft Butte Priority Soils Operable Unit (BPSOU) 2020 Groundwater Compliance and Interpretation Technical Memorandum (dated May 12, 2022, Josh Bryson

Response to Agency Comments Re: Comments on the Draft Butte Priority Soils Operable Unit (BPSOU) Draft Surface Water Compliance and Interpretation Technical Memorandum (dated May 12, 2022), Josh Bryson

Silver Bow Creek Conservation Area (SBCCA) – Revised 95% Programmatic Technical Specifications Submittal, Josh Bryson

Subject: Quarterly Operations and Maintenance Report Grove Gulch Sedimentation Bay for Fourth Quarter 2025 and First Quarter 2026 Silver Bow Creek/Butte Area NPL Site – Butte Priority Soils Operable Unit Consent Decree-Civil Action No. CV 89-039-BU-SHE, Josh Bryson

RE: Silver Bow Creek Butte Area NPL Site, Butte Priority Soils Operable Unit (BPSOU) Draft 2025 Groundwater Monitoring Data Summary Report Consent Decree-Civil Action No. CV 89-039-BU-SHE, Josh Bryson and Pioneer Technical Services, Inc.

2022 BPSOU Stormwater Evaluation and Maintenance Report Annual Stormwater Report for BPSOU Stormwater Structures, Butte-Silver Bow Department of Reclamation and Environmental Services

2022 BPSOU Stormwater Evaluation and Maintenance Report Annual Stormwater Report for BPSOU Stormwater Structures, Butte-Silver Bow Department of Reclamation and Environmental Services

2022 BPSOU Stormwater Evaluation and Maintenance Report Annual Stormwater Report for BPSOU Stormwater Structures, Butte-Silver Bow Department of Reclamation and Environmental Services

2023 BPSOU Stormwater Evaluation and Maintenance Report Annual Stormwater Report for BPSOU Stormwater Structures, Butte-Silver Bow Department of Reclamation and Environmental Services

2023 BPSOU Stormwater Evaluation and Maintenance Report Annual Stormwater Report for BPSOU Stormwater Structures, Butte-Silver Bow Department of Reclamation and Environmental Services

2023 BPSOU Stormwater Evaluation and Maintenance Report Annual Stormwater Report for BPSOU Stormwater Structures, Butte-Silver Bow Department of Reclamation and Environmental Services

2024 Annual Operations and Maintenance Report - 2024 BRES Annual Summary Report for Work Completed in Quadrant 4, Butte-Silver Bow Department of Reclamation and Environmental Services

2024 Annual Operations and Maintenance Report 2024 BRES Annual Summary Report for Work Completed in Quadrant 4, Butte-Silver Bow Department of Reclamation and Environmental Services

2024 Annual Operations and Maintenance Report 2024 BRES Annual Summary Report for Work Completed in Quadrant 4, Butte-Silver Bow Department of Reclamation and Environmental Services

2024 BPSOU Stormwater Evaluation and Maintenance Report Annual Stormwater Report for BPSOU Stormwater Structures, Butte-Silver Bow Department of Reclamation and Environmental Services

2024 BPSOU Stormwater Evaluation and Maintenance Report Annual Stormwater Report for BPSOU Stormwater Structures, Butte-Silver Bow Department of Reclamation and Environmental Services

2024 BPSOU Stormwater Evaluation and Maintenance Report Annual Stormwater Report for BPSOU Stormwater Structures, Butte-Silver Bow Department of Reclamation and Environmental Services

Butte Reclamation Evaluation System Corrective Action Plans for Reclaimed Sites 2025 BRES Site Specific Corrective Action Plans for Quadrant 2, Butte-Silver Bow Department of Reclamation and Environmental Services

DRAFT FINAL PHASE I PRE-DESIGN INVESTIGATION EVALUATION REPORT BLACKTAIL CREEK RIPARIAN ACTIONS BUTTE PRIORITY SOILS OPERABLE UNIT OF THE SILVER BOW CREEK/BUTTE AREA SUPERFUND SITE SILVER BOW COUNTY, MONTANA, HydroGeoLogic, Inc.

DRAFT FINAL REMEDIAL DESIGN WORK PLAN BLACKTAIL CREEK RIPARIAN ACTIONS BUTTE PRIORITY SOILS OPERABLE UNIT OF THE SILVER BOW CREEK/BUTTE AREA SUPERFUND SITE SILVER BOW COUNTY, MONTANA, HydroGeoLogic, Inc.

DRAFT INTERMEDIATE (60%) REMEDIAL DESIGN REPORT BLACKTAIL CREEK RIPARIAN ACTIONS BUTTE PRIORITY SOILS OPERABLE UNIT OF THE SILVER BOW CREEK/BUTTE AREA SUPERFUND SITE SILVER BOW COUNTY, MONTANA, HydroGeoLogic, Inc.

DRAFT UNIFORM FEDERAL POLICYQUALITY ASSURANCE PROJECT PLAN ADDENDUM, HydroGeoLogic, Inc.

Butte Priority Soils Operable Unit (BPSOU) Data Summary Report (DSR) Statement of Authenticity Updates, Mike McAnulty

Butte Priority Soils Operable Unit (BPSOU) Final Unreclaimed Sites Field Sampling Plan (FSP) Package #7: UR-01, UR-12, UR-03, UR-04, UR-15, and UR-17 Amendment, Mike McAnulty

Butte Priority Soils Operable Unit Draft Final Insufficiently Reclaimed Sites Field Sampling and Investigation Plan: BRES No. 105 – Lizzie Shaft, Mike McAnulty

Butte Priority Soils Operable Unit Draft Final Insufficiently Reclaimed Sites Field Sampling and Investigation Plan: BRES No. 11 – Magna Charta Lessee Dumps, Mike McAnulty

Butte Priority Soils Operable Unit Draft Final Insufficiently Reclaimed Sites Field Sampling and Investigation Plan: BRES No. 129 – Heaney Dump, Mike McAnulty

Butte Priority Soils Operable Unit Draft Final Insufficiently Reclaimed Sites Field Sampling and Investigation Plan: BRES No 135 – Washoe Sampling Works, Mike McAnulty

Butte Priority Soils Operable Unit Draft Final Insufficiently Reclaimed Sites Field Sampling and Investigation Plan: BRES No. 1503 – Hornet Addition, Mike McAnulty

Butte Priority Soils Operable Unit Draft Final Insufficiently Reclaimed Sites Field Sampling and Investigation Plan: BRES No. 1503 – Hornet Addition, Mike McAnulty

Butte Priority Soils Operable Unit Draft Final Reclamation Improvement Field Sampling and Investigation Plan: BRES No. 160S – Syndicate Pit Dumps, Mike McAnulty

Butte Priority Soils Operable Unit Draft Final Reclamation Improvement Field Sampling and Investigation Plan: BRES No. 171 – Blaine Center, Mike McAnulty

Butte Priority Soils Operable Unit Draft Final Reclamation Improvement Field Sampling and Investigation Plan: BRES No. 180 – Tullamore Dumps, Mike McAnulty

Butte Priority Soils Operable Unit Draft Final Reclamation Improvement Field Sampling and Investigation Plan: BRES No. 57 – Little Mina-1, Mike McAnulty

Butte Priority Soils Operable Unit Draft Final Reclamation Improvement Field Sampling and Investigation Plan: BRES No. 68 – Little Mina-2, Mike McAnulty

Butte Priority Soils Operable Unit Draft Final Reclamation Improvement Field Sampling and Investigation Plan: BRES No. 75 – National Dump, Mike McAnulty

Butte Priority Soils Operable Unit Final Butte Hill Revegetation Specifications, Mike McAnulty

Butte Priority Soils Operable Unit Final Butte Priority Soils Operable Unit Unreclaimed Sites Field Sampling and Investigation Plan: UR-41 – Montana Street and Interstate 90, Mike McAnulty

Final Butte Priority Soils Operable Unit Unreclaimed Sites Field Sampling and Investigation Plan: UR-51 –Area near BRES No. 50 – Zelia and Mountain Con Mine, Mike McAnulty

Final Butte Priority Soils Operable Unit Unreclaimed Sites Field Sampling and Investigation Plan: UR-52 Area West of BRES No. 133 – Dexter Mill, Mike McAnulty

Final Butte Priority Soils Operable Unit Unreclaimed Sites Field Sampling and Investigation Plan: UR-52 Area West of BRES No. 133 – Dexter Mill, Mike McAnulty

Medical Monitoring Working Group Meeting Minutes, Mike McAnulty

RE: Butte Priority Soils Operable Unit (BPSOU) Final BPSOU Unreclaimed Sites Anderson Shaft Remedial Action Work Plan (RAWP) Request for Change UR-2026-RA-01, Mike McAnulty

RE: Butte Priority Soils Operable Unit (BPSOU) Final BPSOU Unreclaimed Sites Anderson Shaft Remedial Action Work Plan (RAWP) Request for Change UR-2026-RA-01, Mike McAnulty

Re: Butte Priority Soils Operable Unit Draft Final Insufficiently Reclaimed Sites Field Sampling and Investigation Plan: BRES No. 46 – Missoula Mine, Mike McAnulty

Re: Butte Priority Soils Operable Unit Draft Final Insufficiently Reclaimed Sites Field Sampling and Investigation Plan: BRES No. 9 – Clark Street Dump, Mike McAnulty

RE: Butte Priority Soils Operable Unit Final Butte Priority Soils Operable Unit Unreclaimed Sites Field Sampling and Investigation Plan: UR-53 – South of Surprise Dump, Mike McAnulty

Re: Draft Final Butte Priority Soils Operable Unit Unreclaimed Sites Field Sampling and Investigation Plan: UR-41 – Montana Street and Interstate-90, Mike McAnulty

Re: Draft Final Butte Priority Soils Operable Unit Unreclaimed Sites Field Sampling and Investigation Plan: UR-51 –Area near BRES No. 50 – Zelia and Mountain Con Mine, Mike McAnulty

Re: Draft Final Butte Priority Soils Operable Unit Unreclaimed Sites Field Sampling and Investigation Plan: UR-52 Area West of BRES No. 133 – Dexter Mill, Mike McAnulty

Re: Draft Final Butte Priority Soils Operable Unit Unreclaimed Sites Field Sampling and Investigation Plan: UR-53 – South of Surprise Dump, Mike McAnulty

Butte Medical Monitoring Working Group Meeting, Mike McAnulty and Eric Hassler

Butte Medical Monitoring Working Group Meeting, Mike McAnulty and Eric Hassler

Medical Monitoring Working Group Meeting Minutes, Mike McAnulty and Eric Hassler

Draft 2025 Butte Priority Soils Operable Unit Residential Metals Abatement Program Construction Completion Report, Abby Peltomaa

2026 Final BPSOU Backfill and Cover Material Quality Assurance Project Plan (QAPP), Pioneer Technical Services, Inc.

2026 Final Insufficiently Reclaimed Sites Quality Assurance Project Plan (QAPP), Pioneer Technical Services, Inc.

2026 Final Insufficiently Reclaimed Sites Quality Assurance Project Plan (QAPP), Pioneer Technical Services, Inc.

2026 Final Unreclaimed Sites Quality Assurance Project Plan (QAPP), Pioneer Technical Services, Inc.

2026 Final Unreclaimed Sites Quality Assurance Project Plan (QAPP), Pioneer Technical Services, Inc.

2026 Final Unreclaimed Sites Quality Assurance Project Plan (QAPP), Pioneer Technical Services, Inc.

2026 Revised Draft Final BPSOU Backfill and Cover Material Quality Assurance Project Plan (QAPP), Pioneer Technical Services, Inc.

2026 Revised Draft Final BPSOU Backfill and Cover Material Quality Assurance Project Plan (QAPP), Pioneer Technical Services, Inc.

Butte Priority Soils Operable Unit Final 2022 Unreclaimed Sites Sampling: UR-27 Site Evaluation Summary Report, Pioneer Technical Services, Inc.

Butte Priority Soils Operable Unit Final 2024 Unreclaimed Sites Sampling: UR-46 Site Evaluation Summary Report, Pioneer Technical Services, Inc.

Draft Final 2022 Unreclaimed Sites Sampling: UR-07 Site Evaluation Summary Report, Pioneer Technical Services, Inc.

Draft Final 2022 Unreclaimed Sites Sampling: UR-27 Site Evaluation Summary Report, Pioneer Technical Services, Inc.

Draft Final 2023 Insufficiently Reclaimed Sites Sampling: BRES No. 93 – Soudan Dump Site Evaluation Summary Report, Pioneer Technical Services, Inc.

Draft Final 2023 Reclamation Improvement Sites Sampling: BRES No. 17 – Paymaster Dump Site Evaluation Summary Report, Pioneer Technical Services, Inc.

Draft Final 2023 Reclamation Improvement Sites Sampling: BRES No. 31 – Waste Dump #5 Site Evaluation Summary Report, Pioneer Technical Services, Inc.

Draft Final 2023 Unreclaimed Sites Sampling: UR-31 Site Evaluation Summary Report, Pioneer Technical Services, Inc.

Draft Final 2023 Unreclaimed Sites Sampling: UR-31 Site Evaluation Summary Report, Pioneer Technical Services, Inc.